Sudoku (so͞o dōko͞o') puzzles, despite their Japanese name, were not actually invented
in Japan. According to the history note in
Wikipedia, they
first appeared in France, and then popularized in America. To wit: "The modern Sudoku was
most likely designed anonymously by Howard Garns, a 74-year-old retired architect and freelance
puzzle constructor from Connersville, Indiana, and first published in 1979 by Dell Magazines
as Number Place (the earliest known examples of modern Sudoku)." The word in Japanese, 数独,
means "digit-single." Regardless of its origins, Sudoku is an immensely popular game today.
My older sister, Gayle, is a Sudoku fanatic (the full version of the word "fan," meaning enthusiast;
i.e., she's a fan of Sudoku).

Reproduction of this puzzle without the express permission of RF Cafe
is prohibited. Merci to Live Sudoku for providing this.

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas
and reference material while performing my work as an RF system and circuit design engineer.
The Internet was still largely an unknown entity at the time and not much was available
in the form of WYSIWYG
...

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